Improvement in elevators



G. SCOTT.

Improvement in Elevators.

Pat.ented Aug.27,1872.

. im I N g/@MM UNITED STATES PATENT OFFICE.

GEORGE scoTT, or NEW oELEANs, LOUISIANA.

IMPROVEMENT m `tLrvA-rons.

Spccication forming part of Letters Patent No. 130,824, dated August 27,1872.

Specification describing certain Improvements in Elevating Apparatus,invented by GEORGE SCOTT, of New Orleans, in the parish `of Orleans andState of Louisiana.

quired point in its operation; and of certainother devices to behereinafter fully described and claimed.

In the annexed drawing, Figure 1 is a side elevation of my improvedelevating apparatus. Fig. 2 is a plan or top view thereof with thebrake, consisting of springs and weighted lever, and the fly-wheelremoved. Fig. 3 is'a section'thereof, exhibiting the endlesslifting-rope, embracing the lifting or elevating platform. Fig. 4 isalso a section of the same, showing a worm77 or screw-shaft gearing witha pinion, which are operated by a lever, and are for the purposevofalternately throwing the large and small pinions, which regulate thevelocity of the ascent and descent of the platform, in and out of gearwith the drum for windingl and unwindin g the lifting-rope of saidplatform; and Fig. 5 represents a side viewof the springs and weightedlever acting as a brake for the fly7-wheel, and the said fly 77-wheelwith a drum or annular iiange constructed thereon.

Similar letters in the several figures refer to corresponding parts.

To enable others to make and use my invention I will proceed to describeit.

. In the accompanying drawing, A A refer to two uprights, fastened attheir'vlower ends to the iioor ofthe store or warehouse within which itis desired to place the apparatus, and firmly braced and connectedtogether at their upper ends by metallic plates B B or other suitablemeans. Q designates a cylinder or drum, which has its bearings withinthe braces or plates B B by means of a shaft, to each end of whichshaft, upon the outside of the said braces, is attached, respectively,alarge and small pinion, indicated by the letters D and E, to be morefully hereinafter referred to. The center of this drum is so constructed(as is plainl-y shown in` Fig. 2) as to retain then chain F properly inx place while passing over it, and upon one side of its center with aright-handed spiral thread, and upon the opposite side thereof with alefthanded spiral thread, by means of which the lifting-rope G-the endsof which pass around it (the drum) while its (the ropes) bight or loopedportion holds the cross-bar of the lifting platform-is caused to wind uptoward the central part of said drum, and unwind toward the ends of saiddrum, while the platform is as cending and descending, whereby thelatter is prevented from swagging, or' kept in a vertical plane duringits operation. rlhe chain F is attached at one end to the platform H,and supplied at its opposite end 'with a weight, f, confined within acase, f'. rIhe object of this chain and weight is, in case thelifting-rope should break, to hold the platform and prevent it fromfalling. I refers to the "iiyh wheel, the axle or shaft of which isjournaled between and within an upright, i, and one of the uprights A.rEhe periphery of this wheel is grooved forthe reception of a rope withwhich to operate it when it is desired to elei vate or lower theplatform H. Upon one side of this wheel is constructed an annularflange, forming a drum, I', around which are bent or passed two curvedsprings,`J J', both of which are fastened by means of the same pin tothe upright at their lower extremities, while their upper ends are sfastened to the weighted lever K, pivoted to upright i, as that when thesaid lever is vibrated in one or the other direction the said springswill be tightened or loosened around the drum I', which will firmly holdthe iiywheel I and prevent it from revolving when it is desired toretain the platform H at any required point, or allow the said wheel tobe revolved, permitting the said platform to ascend and descend withoutinterruption. il is a support fastened to the upright t', and havingpulleys, over which the rope or cord k, fastened to lever K, passes.This cord or rope, which is inten ded to be within reach of theoperator, is for the purpose of throwing the lever K down in such amanner as to tighten the springs J J', brakingthe dy wheel I. k' isanother cord or rope for pulling the lever forward so as to loosen thespringswhen it is desired to unbrake the fly "-wheel. i2 is a stop forthe lever K, and is fastened to upright i. L is a pinion which isfastened upon the shaft of the fly "-wheel I, and which 2 l leasen gearswith the Alarge pinion M, gearing with the small pinion E of the drum C.Through this gearing fast motion is imparted to the said drum when they7-wheel is revolved. Gearing with the large pinion D,upon the 'oppositeside of the drum C, is another small pinion, N, which is journaled uponthe end ofthe shaft carrying the large pinion'M, and is for thepurposeof communicating slow motion to the drum (l. Upon the central or greaterpart of the shaft carrying the pinions M N is a wor1n,7 O, which has itsthreads or ribs running at right angles to that of the said pinions, andgearing with a pinion, P, whose shaft Pl runs parallel with the braces BB, and is supplied at its opposite or projecting end with a V- shapedarm or handle, P2, by which, Vwhen either arm is operated, the pinions MN are respective] thrown in and out of gear with the pinions upon thedrum C, whereby slow or fast motion of the said drum is obtained. Thecordsv attached to the arms of the V-shaped arni P2, and passing 'arounda pulley fastened to one of the uprights A A, is for the purpose ofconveniently operating said arm. The projection p is a step to'preventthe arm P from being thrown out of its proper place.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

1. The hoisting-cylinder C, with pinions D E, in combination withpinions M N, worm O, pinion P, shaft'Pl, and arm P2, substantially asherein shown and described.

2. In combination with the foregoing parts, the iiy-wheel I I', springsJJ', lever K, support l mounted with pulleys, ropes k le', and stop t2,as set forth.

In testimony whereof I have hereunto signed my name this 1st day ofFebruary, 1872, in presence of two subscribing witnesses.

GEORGE SCOTT.

NVitnesses W. H. DIXON, C. YERNER. o

